– Picnic at Asgard, Have we done Asgard yet?
– ...
– Obviously not. Blimey, very early days then. Oo! Life with a time traveller, never knew it could be such hard work. Um... Look at you. You're young.
– I'm really not, you know.
– Oh but you are. Your eyes! You're younger than I've ever seen you.
– You've seen me before then?
– Doctor, please tell me you know who I am.
– Who are you?